Rotech Subsea completes cable burial at Dutch wind farm

4C Offshore | Tom Russell
By: 09/05/2022 Rotech Subsea

Rotech Subsea has beenactive in European waters again, facilitating an inter array cable repair at an offshore wind farm on the Dutch Continental Shelf.


Rotech’s TRS1 CFE tool was mobilised to carry out 440m of remedial burial and 140 metres of post-lay burial to client specification of 1.5 metres depth. Deployed by crane from an offshore support vessel, the TRS1 was suspended above the cable, traveling along the cable route at a rate of 4m/min in water depths of 20-30 metres.

The cable burial was carried out in soft silty and soft clay soils with the TRS1’s outlet pressure of 80kPa and maximum jet flow of 3,400L/s completing the job in just two passes. Currents experienced ranged from 0.6-1.4kts with sea state of 1m Hs.

“The Rotech Subsea team and the support vessel deck crew from this valued client worked really well together again to ensure an efficient tool launch and successful project overall,”
said Rotech Subsea Director of Subsea, Stephen Cochrane. “Our TRS1 CFE tool excelled, achieving the required cable depth of 1.5m with ease with trench depth monitored in real time using a tool-mounted sonar imager.”


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